One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(10,15)(12,13)(16,24)(17,22)(18,23)(19,21) involution — undirected(3,4)(6,7)(9,10)(11,18)(12,15)(13,22)(14,17)(16,20)(19,24)(21,23) involution — undirected(1,3,5,4)(2,6,8,7)(9,11)(10,16)(12,19)(13,21)(14,20)(15,23)(17,18)(22,24)(1,4,5,3)(2,7,8,6)(9,11)(10,16)(12,21)(13,19)(14,20)(15,24)(17,18)(22,23)(2,8)(6,7)(9,12,14,13)(10,15,17,22)(11,19,20,21)(16,23,18,24)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.